/*
 * Copyright (c) 2010-2011, okazoh_tk. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *  - Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *  - Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *  - Neither the name of the copyright holder nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef ALKES_PNG_UTIL_H_INCLUDED_
#define ALKES_PNG_UTIL_H_INCLUDED_

#include "alkes/codec/internal.h"
#include <png.h>

#if defined(__cplusplus)
extern "C" {
#endif

/// \addtogroup codec
//@{

typedef void* PngReader;

typedef void (*read_png_callback)(void* opaque, void* data, size_t count);

#define AL_PNGTRANS_STRIP_16    (0x0001)
#define AL_PNGTRANS_PACKING     (0x0002)
#define AL_PNGTRANS_BGR         (0x0004)
#define AL_PNGTRANS_SWAP_ALPHA  (0x0008)
#define AL_PNGTRANS_STRIP_ALPHA (0x0010)
#define AL_PNGTRANS_ADD_ALPHA   (0x0020)


/**
@retval 0 Successed.
@retval !0 Failed.
*/
extern int alkes_create_png_reader(void* opaque, read_png_callback read_data_fn, PngReader* reader);
extern void alkes_destroy_png_reader(PngReader reader);

/**
@retval 0 Successed.
@retval !0 Failed.
*/
extern int alkes_get_png_info(
    PngReader reader,
    uint16_t* width, uint16_t* height,
    int32_t* bit_depth, int32_t* color_type, uint8_t* channels);

/**
@retval 0 Successed.
@retval !0 Failed.
*/
extern int alkes_set_png_trans(PngReader reader, uint32_t trans);

/**
@retval 0 Successed.
@retval !0 Failed.
*/
extern int alkes_decode_png(
    PngReader reader,
    void* buffer, int32_t pitch, uint16_t height, uint32_t trans);

//@}

#if defined(__cplusplus)
}
#endif

#endif
